2645987451 has 4 divisors (see below), whose sum is σ = 3527983272. Its totient is φ = 1763991632.

The previous prime is 2645987431. The next prime is 2645987453. The reversal of 2645987451 is 1547895462.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2645987451 - 2⁹ = 2645986939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2645987394 and 2645987403.

It is not an unprimeable number, because it can be changed into a prime (2645987453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440997906 + ... + 440997911.

It is an arithmetic number, because the mean of its divisors is an integer number (881995818).

Almost surely, 2^2645987451 is an apocalyptic number.

2645987451 is a deficient number, since it is larger than the sum of its proper divisors (881995821).

2645987451 is an equidigital number, since it uses as much as digits as its factorization.

2645987451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881995820.

The product of its digits is 2419200, while the sum is 51.

The square root of 2645987451 is about 51439.1626195450. The cubic root of 2645987451 is about 1383.1287010546.

The spelling of 2645987451 in words is "two billion, six hundred forty-five million, nine hundred eighty-seven thousand, four hundred fifty-one".